It is not an arrogant government that chooses priorities, it's an irresponsible government that fails to choose.

I've never ruled out the possibility of going back into public service.

If what the science tells us about climate change is correct, then unabated it will result in catastrophic consequences for our world.

When my parents were growing up the world's population was under three billion. During my children's lifetime, it is likely to exceed nine billion. You don't need to be an expert to realise that sustainable development is going to become the greatest challenge we face this century

Our new world rests on order. The danger is disorder. And in today's world, it can now spread like contagion.

There are big questions about the sort of skills you need in modern government today. You put politicians in charge of billions of dollars with absolutely no training and very little support system around them. It's an extraordinary thing.

The first rule in politics is that there are no rules, at least not in the sense of inevitable defeats or inevitable victories. If you have the right policy and the right strategy, you always have a chance of winning. Without them, you can lose no matter how certain the victory seems.